CN219809971U - Water return system of heating installation - Google Patents
Water return system of heating installation Download PDFInfo
- Publication number
- CN219809971U CN219809971U CN202320850127.7U CN202320850127U CN219809971U CN 219809971 U CN219809971 U CN 219809971U CN 202320850127 U CN202320850127 U CN 202320850127U CN 219809971 U CN219809971 U CN 219809971U
- Authority
- CN
- China
- Prior art keywords
- water return
- liquid level
- heating water
- contactor
- switch
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 238000010438 heat treatment Methods 0.000 title abstract description 8
- 238000009434 installation Methods 0.000 title abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 239000008236 heating water Substances 0.000 claims abstract description 32
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 239000011521 glass Substances 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004070 electrodeposition Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The utility model discloses a heating water return system, which comprises a liquid level relay KA, wherein a sealing plug is covered at the pipe orifice of a transparent pipe, a three-core cable with one end arranged in the transparent pipe is arranged on the sealing plug in a penetrating way, and the other end of the three-core cable is connected with three output terminals of the liquid level relay KA; the control loop comprises a change-over switch and a contactor KM; the automatic end SA1 of the transfer switch, the normally closed contact of the liquid level relay KA and the coil of the contactor KM form a closed loop. The advantages are that: compared with the prior art, the heating water return tank is of a closed structure, realizes automatic control, does not need frequent overhaul of staff, effectively avoids scalding, has high safety and is beneficial to improving the production efficiency; in addition, through setting up transparent pipe, increase the visuality of heating installation return water tank liquid level, maneuverability is strong, and the utility model simple structure moreover, with low costs.
Description
Technical field:
the utility model relates to the technical field of heating equipment, in particular to a heating water return system.
The background technology is as follows:
at present, most liquid level control in a heating water return tank usually adopts a metal float switch, a plastic float switch or a liquid level sensor (pressure sensor), the metal float switch is easy to rust, a mechanism is easy to rust, the plastic float switch is easy to deform at high temperature, the pressure sensor has high economic cost, and holes are also needed to be formed in the upper part of the water return tank; frequently overhauling is caused by the reasons, and unsafe accidents frequently occur due to scalding caused by high-temperature steam at the opening during overhauling.
The utility model comprises the following steps:
the utility model aims to provide a heating water return system with low cost, strong operability and high safety.
The utility model is implemented by the following technical scheme: the heating water return system comprises a heating water return tank, wherein the heating water return tank is communicated with a boiler through a water return pump; the water return tank also comprises a liquid level relay KA, a control loop of the water return pump and a transparent pipe communicated with the bottom of the heating water return tank, wherein the top surface of the transparent pipe is higher than the top surface of the heating water return tank; a sealing plug is arranged at the pipe orifice of the transparent pipe in a covering way, a three-core cable with one end arranged in the transparent pipe is arranged on the sealing plug in a penetrating way, and the other end of the three-core cable is connected with three output terminals of the liquid level relay KA; the control loop comprises a change-over switch and a contactor KM; the automatic end SA1 of the transfer switch, the normally closed contact of the liquid level relay KA and the coil of the contactor KM form a closed loop.
Further, it also includes a first manual switch SB1 and a second manual switch SB2; the manual end SA2 of the change-over switch, the first manual switch SB1 and the second manual switch SB2 are sequentially connected in series, the end part of the manual end SA2 of the change-over switch is connected with one end of the automatic end SA1 of the change-over switch adjacent to the power supply L, and the end part of the second manual switch SB2 is connected between the normally closed contact of the liquid level relay KA and the coil of the contactor KM; the second manual switch SB2 is connected in parallel with a normally open contact of the contactor KM.
Further, the transparent tube is a glass tube.
Further, a normally closed contact of a thermal relay FR is connected in series to the power N end of the control loop.
The utility model has the advantages that: compared with the prior art, the heating water return tank is of a closed structure, realizes automatic control, does not need frequent overhaul of staff, effectively avoids scalding, has high safety and is beneficial to improving the production efficiency; in addition, through setting up transparent pipe, increase the visuality of heating installation return water tank liquid level, maneuverability is strong, and the utility model simple structure moreover, with low costs.
Description of the drawings:
fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a schematic diagram of a main circuit structure according to the present utility model.
Fig. 3 is a schematic diagram of a control loop according to the present utility model.
The components in the drawings are marked as follows: the heating water return tank 1, the water return pump 2, the boiler 3, the transparent pipe 4, the sealing plug 5, the three-core cable 6, the liquid level relay KA, the main loop 7, the control switch QF, the thermal relay FR, the contactor KM, the control loop 8, the automatic end SA1 of the change-over switch, the manual end SA2 of the change-over switch, the first manual switch SB1 and the second manual switch SB2.
The specific embodiment is as follows:
the following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1 to 3, the present embodiment provides a heating water return system, which includes a heating water return tank 1, the heating water return tank 1 being communicated with a boiler 3 through a water return pump 2; the backwater heated by the boiler 3 flows back to the heating backwater tank 1, and the water in the heating backwater tank 1 is pumped into the boiler 3 through the backwater pump 2 to realize circulation; the water heater also comprises a liquid level relay KA, a control loop 8 of the water return pump 2 and a transparent pipe 4 communicated with the bottom of the heating water return tank 1, wherein the transparent pipe 4 is a glass pipe, and the top surface of the transparent pipe 4 is higher than the top surface of the heating water return tank 1; the pipe orifice of the transparent pipe 4 is covered with a sealing plug 5, a three-core cable 6 with one end arranged in the transparent pipe 4 is arranged on the sealing plug 5 in a penetrating way, the other end of the three-core cable 6 is connected with three output terminals of a liquid level relay KA, as shown in figure 1, three output terminals 5, 6 and 7 of the liquid level relay KA are correspondingly connected with the three-core cable 6, in addition, a terminal 3 of the liquid level relay KA is a public end, a terminal 4 is a normally-closed end, and a terminal 2 is a normally-open end; the liquid level relay is connected with a conductor as a liquid level detection electrode in the prior art known in the field, and in the embodiment, a three-core cable 6 is used as an electrode for detecting the liquid level; the liquid level in the heating water return tank 1 can be embodied through the transparent pipe 4, and the height of the liquid level is monitored through setting the length of the electrode of the three-core cable 6 according to actual working conditions, so that the starting and stopping of the water return pump 2 are controlled through the control loop 8.
The control loop 8 comprises a transfer switch, a contactor KM, a first manual switch SB1 and a second manual switch SB2; the main circuit 7 controlled by the embodiment is an existing circuit and comprises a driving motor of the water return pump 2 connected with three-phase alternating current, and the main circuit 7 is connected with a control switch QF, a normally open contact of a contactor KM and a thermal relay FR in series; before operation, the control switch QF is closed.
The automatic end SA1 of the transfer switch, the normally closed contact of the liquid level relay KA and the coil of the contactor KM form a closed loop; one end of a manual end SA2 of the change-over switch, one end of a first manual switch SB1 and one end of a second manual switch SB2 are sequentially connected in series, the other end of the manual end SA2 of the change-over switch is connected with one end, adjacent to a power supply L, of an automatic end SA1 of the change-over switch, and the other end of the second manual switch SB2 is connected between a normally-closed contact of a liquid level relay KA and a coil of a contactor KM; the second manual switch SB2 is connected with a normally open contact of the contactor KM in parallel, a normally closed contact of the thermal relay FR is connected in series with the power N end of the control loop 8, and a control switch QF is connected in series with the power L end of the control loop 8.
Closing the control switch QF on the control loop 8 to switch the transfer switch to the automatic end SA1, i.e. closing SA1; when the liquid level in the heating water return tank 1 reaches the highest electrode position of the three-core cable 6, the terminal 3 and the terminal 4 of the liquid level relay KA are in conductive communication, the normally closed contact of the liquid level relay KA on the control loop 8 is powered on, the coil of the contactor KM is powered on, the normally open contact of the contactor KM on the main loop 7 is closed, the water return pump 2 starts to operate, water in the heating water return tank 1 is automatically pumped into the boiler 3, and meanwhile, the water level in the heating water return tank 1 starts to drop; when the water level in the heating water return tank 1 is lower than the middle-level electrode position of the three-core cable 6, the normally closed contact of the liquid level relay KA is disconnected and loses power, the coil of the contactor KM is disconnected, the normally open contact of the contactor KM on the main loop 7 is disconnected, and the water return pump 2 stops running; compared with the prior art, the heating water return tank 1 is of a closed structure, realizes automatic control, does not need frequent overhaul of staff, effectively avoids scalding, is high in safety, and is beneficial to improving production efficiency.
When the liquid level relay KA fails, manual control can be realized through the utility model, and the change-over switch is switched to the manual end SA2, namely the SA2 is closed; the staff can clearly determine the liquid level in the heating water return tank 1 through observing the transparent pipe 4, by visually observing the actual condition of the liquid level on site, when water needs to be pumped, the second manual switch SB2 is pressed down, the coil of the contactor KM is electrified, the normally open contact of the contactor KM on the control loop 8 is closed and self-locked, meanwhile, the normally open contact of the contactor KM on the main loop 7 is closed, the water return pump 2 starts to operate, when the visual liquid level is reduced to a certain position, the first manual switch SB1 is started, the coil of the contactor KM is deenergized, the normally open contact of the contactor KM on the main loop 7 is disconnected, and the water return pump 2 stops operating; through setting up transparent pipe 4, increase the visuality of heating installation return water tank 1 liquid level, maneuverability is strong, and the utility model simple structure moreover, with low costs.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (4)
1. The heating water return system comprises a heating water return tank, wherein the heating water return tank is communicated with a boiler through a water return pump; the water heater is characterized by further comprising a liquid level relay KA, a control loop of the water return pump and a transparent pipe communicated with the bottom of the heating water return tank, wherein the top surface of the transparent pipe is higher than the top surface of the heating water return tank; a sealing plug is arranged at the pipe orifice of the transparent pipe in a covering way, a three-core cable with one end arranged in the transparent pipe is arranged on the sealing plug in a penetrating way, and the other end of the three-core cable is connected with three output terminals of the liquid level relay KA;
the control loop comprises a change-over switch and a contactor KM; the automatic end SA1 of the transfer switch, the normally closed contact of the liquid level relay KA and the coil of the contactor KM form a closed loop.
2. A heating water return system according to claim 1, further comprising a first manual switch SB1 and a second manual switch SB2; the manual end SA2 of the change-over switch, the first manual switch SB1 and the second manual switch SB2 are sequentially connected in series, the end part of the manual end SA2 of the change-over switch is connected with one end of the automatic end SA1 of the change-over switch adjacent to the power supply L, and the end part of the second manual switch SB2 is connected between the normally closed contact of the liquid level relay KA and the coil of the contactor KM; the second manual switch SB2 is connected in parallel with a normally open contact of the contactor KM.
3. A heating water return system according to claim 1, wherein the transparent tube is a glass tube.
4. A heating water return system according to claim 1, wherein the power N end of the control loop is connected in series with a normally closed contact of the thermal relay FR.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320850127.7U CN219809971U (en) | 2023-04-13 | 2023-04-13 | Water return system of heating installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320850127.7U CN219809971U (en) | 2023-04-13 | 2023-04-13 | Water return system of heating installation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219809971U true CN219809971U (en) | 2023-10-10 |
Family
ID=88214706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320850127.7U Active CN219809971U (en) | 2023-04-13 | 2023-04-13 | Water return system of heating installation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219809971U (en) |
-
2023
- 2023-04-13 CN CN202320850127.7U patent/CN219809971U/en active Active
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| GR01 | Patent grant |